The European Physical Journal C - Particles and Fields

, Volume 45, Issue 3, pp 643–657

The Θ13 and δCP sensitivities of the SPL-Fréjus project revisited


    • Université Paris-SudLaboratoire de l'Accélérateur Linéaire
  • A. Cazes
    • Université Paris-SudLaboratoire de l'Accélérateur Linéaire
Experimental Physics

DOI: 10.1140/epjc/s2005-02455-x

Cite this article as:
Campagne, J.E. & Cazes, A. Eur. Phys. J. C (2006) 45: 643. doi:10.1140/epjc/s2005-02455-x


An optimization of the CERN SPL beam line has been performed guided by the sensitivities to the Θ13 mixing angle and to the δCP Dirac CP violating phase. A UNO-like 440 ktons water Čerenkov detector located at 130 km from the target in a new foreseen Fréjus laboratory has been used as a generic detector. Concerning the δCP independent Θ13 sensitivity, a gain of about 20% may be reached using a 3.5 GeV proton beam with a 40 m long, 2 m radius decay tunnel compared to the up to now considered 2.2 GeV beam energy and 20 m long, 1 m radius decay tunnel. This may motivate new machine developments to upgrade the nominal SPL proton beam energy.

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© Springer-Verlag 2005